Mowing-machine knife



(Model.)

J. M. H'AMBLIN.

' MOWING MACHINE KNIFE. No. 305,813. Patented Sept. 30, 1884.

`vvnmssas: 1 INVBNToR;

M/za/w BY I.

ATTGRNEYS.

N. mms Phomumegqpw. wnnmgm a a which similar letters of reference indicate corland eXact description.

broken away at the ce UNITED Srn'rns PATENT Ormes.

JOHN MEDDO HAMBLIN, OF SOUTH UNION, KENTUCKY.

NIOWING-MACHINE KNIFE.

SPECIFICATION forming part of Letters Patent No. 305,813, dated September 30, 1884.

Application filed September 1f?, 1883. Model.)

To @ZZ whom it may concern:

Beit known that l, JOHN M. HAMBLIN, of South Union, in the county of Logan and Sta-te of Kentucky, have invented a new and useful Improvement inMowing Machine Knives, of which the following is a full, clear,

li/Iy invention relates tothe knife-bars and knives of mowing and reaping machines, and has for its object to provide a light, strong, serviceable knife-bar and knives, which may be worked for a prolonged period without excessive gumming and by a comparatively small expenditure of power, and also to provide for the quick, easy, and accurate sharpening of the knives when dulled by use.

Reference is to be had to the accompanying drawings, forming part of this specili cation, in

parts in both the figures a plan View of my improved knives, partly broken away and Eis a cross-sectional ele- Fig. 1, and in larger responding Figure l is knife-bar and in section; and Fig. vation on the line fr x,

size.

The drawings represent the knife-bar a as nier, and showing but two knives or cutters, b, at opposite ends of the bar a.

The ingenbars and other parts of the complete sickle-bar are not shown, as these may be of the usual or any approved construction.

I make the knife-bar a in the rectangular form shown, and with the usual eye, c, for attachment of the connectingrod for its reciprocation through the lingers of the sickle-bar. A. nut, d, threaded on the end of bar b, acts either directly or by an interposed washer, c, to bind the cutters b rmly in place side by sideon bar c for its whole length, as shown. These knives b, I make of a thin sheet or plate oi' steel, the portion of which behind the back pointsuf, of the angular cutting-edges g of the. knives is of about a like width to the extreme ack edge, h, of the knife-blank,v which blank is bent downward, backward, upward, and forward to form the eye or socket fi, shaped to snugly t .the latsided bar a, so that when the knives b are slid upon the bar a and clamped by the nut d against each other and the opposite shoulder j of bar a, said knives will be held with their reversely-inclined cutting-edges g always in the same plane for the whole length ofthebar caso as to work smoothly and with the best effect. Any suitable rivet or other fastenings, k, may be employed to bind the back edge, h,of the knife b firmly to the body portion of the knife. I cut away those portions of the knives b back of their opposite cutting-edges g, as at Z, leaving a central bar, m, for necessary stiffness of the knife, the rear edges of openings Z being about in a line with the folded-over rear edge, 7L,of the k nite-blank. These openings Z serve to reduce the area of the :dat faces of the knives b, so that they are less liable-to be gunimed up by the juices of the crop being inown, and as a consequence the knives will work freer and with less power than would knives devoid of these openings. It will be noted, also, that by making these knives b separate lrom each other they may readily be sharpened with accurate bevel and continuity of both cutting-edges q when removed from the bar a., which may easily and quickly be done by removing the nut d and washer e and sliding the knives b off the end of the bar, and when sharpened the knives may as easily and quickly be replaced and clamped in working position by the nut, as above described.

It is obvious that by providing the knives b with the eyes 'i and holding them on the bar a by the nut d said bar a. is not weakened by holes made in or through itv to receive bolts or screws, by which vthe cutters are secured in the common way, said eyes i serving rather to re-enforce and strengthen the bar a., and permitting and stronger, and assuring a light draft for the machine to which my improvements may be applied. y

Having thus described my invention, I claim as new and desire to secure by Letters Patent#- l.v In a harvesterknifc, the shank bent to pass down in front of the knife-bar, then under and up around it, the end 71, being made to lap over to or near to the pointf, and then secured to the blade, substantially as shown and described.

2. As a new article of manufacture, a cut-J tingblade consisting of the blade b, formed with cutting-edges g, central bar, m, and openings Z, and with its shank bent to form an angular box, t' e i, and to overlap the blade to the point f, where it is firmly secured thereto, substantially as set forth. 4

Witnesses: JOHN MEDDO HAMBLIS.

J. Q. TAYLOR., J @HN MCGUTCHEN, Jr.

the parts to be made lighterr i 

